Tektronix 535A, Instruction Manual

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CHARACTERISTICS
General Information
The Tektronix Type 535A Oscilloscope is a wide-range
general-purpose laboratory instrument providing accurate
measurements in the dc to 15 mc range. The Type 535A can
be operated with any Tektronix letter-series plug-in to sat­
isfy the requirements for virtually any application.
Special circuits incorporated in the Type 535A Oscillo­
scope permit an accurate, continuously variable delay in
the presentation of the sweep from 1 microsecond to 10
seconds after receipt of a triggering impulse. This feature
permits observation of a small portion of the normal sweep,
accurate measurement of waveform jitter, precise time mea­
surements, as well as many other uses.
Vertical-Deflection System
All specifications for the Vertical-Deflection System of the
Type 535A depend upon the plug-in unit used with the
instrument. The following specifications are given assuming
that a Type K Plug-In Unit is used.
Bandpass DC to 15 mc (±=3-db down at
15 m c)
Risetime <0.024 microseconds
Triggering Modes
Time Base A—Automatic, AC, DC, AC Low Frequency
Reject, and High Frequency Sync.
Time Base B —Automatic, AC, and DC.
Triggering Signal Requirements
Internal triggering—a signal producing 2 millimeters of
vertical deflection except 4 millimeters is required in the DC
and Automatic modes.
External triggering— a signal of 0.2 volts to 10 volts. Sweep
will trigger on larger signals, but TRIGGERING LEVEL con­
trol operates over a ±10 volt range. Automatic mode re­
quires 0.4 v.
High Frequency Sync.—Assures a stable display of sine wave
signals to approximately 30 mc. Requires a signal producing
2 centimeters of vertical deflection or an external signal of
more than 2 volts.
Sweep Rates
Time Base A-0.1 microseconds to 5 seconds per centimeter
in 24 accurately calibrated steps. An uncalibrated control
permits sweep rates to be varied continuously between
0.1 microseconds and approximately 12 seconds per centi­
meter. Calibrated sweep rates are typically within 1%, and
in all cases within 3%, of the indicated sweep rate.
Time Base B—2 microseconds to 1 second per centimeter in
18 accurately calibrated steps. Sweep rates are typically
within 1%, and in all cases within 3%, of the indicated
sweep rate.
Magnifier
Provides a 5-times magnification of the center 2-centimeter
portion of the oscilloscope display. Extends the fastest Time
Base A sweep rate to 0.02 microseconds per centimeter and
the fastest Time Base B sweep rate to 0.4 microseconds per
centimeter.
External
Horizontal Input
Deflection factor—approximately 0.2 to 20 volts per centi­
meter, continuously variable.
Frequency response—from de to 350 kHz. Response down
3 db at 350 kHz.
Delayed Sweep
Sweep delay continuously variable from 1 microsecond to
10 seconds. Actual delay steps (between 1.00 and 10.00) are
within 1 % of the indicated delay from 2 µsec/cm to 0.1 sec/
cm; within 3% from 0.2sec/cm to 1 sec/cm. incremental
delay accuracy is within 1% ±4 minor divisions.
Time jitter—1 part in 20,000.
Cathode-Ray Tube
T533P2
Phosphors—Type P2 phosphor normally supplied; PI, P7,
and P11 phosphors optional. Other phosphors available on
special order.
Unblanking—dc coupled.
Accelerating potential—10,000 volts.
Usable viewing area: — 6 by 10 centimeters.
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